physical education. n. (Education) training and practice in sports, gymnastics, etc, as in schools and colleges. Abbreviation: PE. physâ²ical educaâ²tion. n. instruction in sports, exercise, and hygiene, esp. as part of a school or college program.
3. Stress/injury. Stress on the tissues or any type of injury in the mouth can cause canker sores. Since the sores are actually tiny ulcers, they can be caused by any kind of hard brushing or eating something that can cause bruises or lead to tissue inflammation in the mouth.
The sore on the top of the mouth could be caused by a canker sore. According to the American Academy of Otolaryngology, canker sores on the top of the mouth only appear on the soft palate, not on the hard palate.7 You can also get canker sores on the tongue or inside the lips or cheeks.